From 787450f4d9b453ce89c871b3b380706d701c909a Mon Sep 17 00:00:00 2001
From: Yunsup Lee <yunsup@cs.berkeley.edu>
Date: Fri, 18 Oct 2013 19:19:00 -0700
Subject: [PATCH] more hwacha supervisor stuff

---
 hwacha/decode_hwacha_ut.h         |  3 ++-
 hwacha/hwacha.cc                  | 14 ++++++--------
 hwacha/hwacha.h                   | 11 +++++++----
 hwacha/insn_template_hwacha_ut.cc |  6 ++++--
 hwacha/insns/vxcptaux.h           |  2 +-
 hwacha/insns/vxcptcause.h         |  2 +-
 6 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/hwacha/decode_hwacha_ut.h b/hwacha/decode_hwacha_ut.h
index c2e0032..44b993b 100644
--- a/hwacha/decode_hwacha_ut.h
+++ b/hwacha/decode_hwacha_ut.h
@@ -6,7 +6,8 @@
 #include "hwacha.h"
 #include "hwacha_xcpt.h"
 
-#define UTIDX (i)
+#define UTIDX (h->get_ct_state()->count)
+#define WRITE_UTIDX(value) (h->get_ct_state()->count = (value))
 
 #undef RS1
 #undef RS2
diff --git a/hwacha/hwacha.cc b/hwacha/hwacha.cc
index 192d308..74cbbcf 100644
--- a/hwacha/hwacha.cc
+++ b/hwacha/hwacha.cc
@@ -5,15 +5,13 @@
 
 void ct_state_t::reset()
 {
-  vl = 0;
-  maxvl = 32;
   nxpr = 32;
   nfpr = 32;
+  maxvl = 32;
+  vl = 0;
+  count = 0;
 
   vf_pc = -1;
-
-  cause = 0;
-  aux = 0;
 }
 
 void ut_state_t::reset()
@@ -97,10 +95,10 @@ bool hwacha_t::vf_active()
   return false;
 }
 
-void hwacha_t::take_exception(reg_t cause, reg_t aux)
+void hwacha_t::take_exception(reg_t c, reg_t a)
 {
-  get_ct_state()->cause = cause;
-  get_ct_state()->aux = aux;
+  cause = c;
+  aux = a;
   raise_interrupt();
   if (!(p->get_state()->sr & SR_EI))
     throw std::logic_error("hwacha exception posted, but SR_EI bit not set!");
diff --git a/hwacha/hwacha.h b/hwacha/hwacha.h
index 7504e57..100477c 100644
--- a/hwacha/hwacha.h
+++ b/hwacha/hwacha.h
@@ -11,11 +11,9 @@ struct ct_state_t
   uint32_t nfpr;
   uint32_t maxvl;
   uint32_t vl;
+  uint32_t count;
 
   reg_t vf_pc;
-
-  reg_t cause;
-  reg_t aux;
 };
 
 struct ut_state_t
@@ -30,7 +28,7 @@ struct ut_state_t
 class hwacha_t : public extension_t
 {
 public:
-  hwacha_t() : debug(false) {}
+  hwacha_t() : cause(0), aux(0), debug(false) {}
   std::vector<insn_desc_t> get_instructions();
   std::vector<disasm_insn_t*> get_disasms();
   const char* name() { return "hwacha"; }
@@ -40,6 +38,8 @@ public:
   ct_state_t* get_ct_state() { return &ct_state; }
   ut_state_t* get_ut_state(int idx) { return &ut_state[idx]; }
   bool vf_active();
+  reg_t get_cause() { return cause; }
+  reg_t get_aux() { return aux; }
   void take_exception(reg_t, reg_t);
   void clear_exception() { clear_interrupt(); }
 
@@ -50,6 +50,9 @@ private:
   static const int max_uts = 2048;
   ct_state_t ct_state;
   ut_state_t ut_state[max_uts];
+  reg_t cause;
+  reg_t aux;
+
   disassembler_t ut_disassembler;
   bool debug;
 };
diff --git a/hwacha/insn_template_hwacha_ut.cc b/hwacha/insn_template_hwacha_ut.cc
index 7dad75d..79e7c2f 100644
--- a/hwacha/insn_template_hwacha_ut.cc
+++ b/hwacha/insn_template_hwacha_ut.cc
@@ -15,8 +15,10 @@ reg_t hwacha_NAME(processor_t* p, insn_t insn, reg_t pc)
   int xprlen = 64;
   reg_t npc = sext_xprlen(pc + insn_length(OPCODE));
   hwacha_t* h = static_cast<hwacha_t*>(p->get_extension());
-  for (uint32_t i=0; i<VL; i++) {
+  do {
     #include "insns_ut/NAME.h"
-  }
+    WRITE_UTIDX(UTIDX+1);
+  } while (UTIDX < VL);
+  WRITE_UTIDX(0);
   return npc;
 }
diff --git a/hwacha/insns/vxcptaux.h b/hwacha/insns/vxcptaux.h
index 92e2920..77318c3 100644
--- a/hwacha/insns/vxcptaux.h
+++ b/hwacha/insns/vxcptaux.h
@@ -1,2 +1,2 @@
 require_supervisor_hwacha;
-xd = h->get_ct_state()->aux;
+xd = h->get_aux();
diff --git a/hwacha/insns/vxcptcause.h b/hwacha/insns/vxcptcause.h
index e959247..3054ff9 100644
--- a/hwacha/insns/vxcptcause.h
+++ b/hwacha/insns/vxcptcause.h
@@ -1,3 +1,3 @@
 require_supervisor_hwacha;
 h->clear_exception();
-xd = h->get_ct_state()->cause;
+xd = h->get_cause();
-- 
2.30.2